Measurement device and system for measuring fluid flow

Abstract

A measuring device and system for measuring fluid flow are disclosed. A measurement device (1000) configured for coupling to a control device (2000) includes a fluid conduit (1200), a first electrical connector (1480, 1480 ', 1480' '), a first ultrasonic transducer (1410) and a second ultrasonic transducer (1420) electrically connected to the first electrical connector, respectively, and an acoustic coupling medium (1140) coupling the first and second ultrasonic transducers (1410, 1420) to the fluid conduit. The first ultrasonic transducer is configured to emit an ultrasonic signal along a sound path (1160) in response to receiving the control signal, the sound path extending from the first ultrasonic transducer through the acoustic coupling medium to the second ultrasonic transducer. The second ultrasonic transducer is configured to receive the ultrasonic signal transmitted along the sound path and to generate a measurement signal based on the received ultrasonic signal, where the fluid conduit is disposed at least partially along the sound path such that the transmitted ultrasonic signal propagates along the sound path and impinges on the medium to be measured in a measurement section (1230) of the fluid conduit. The control device (2000) comprises a housing (2100) comprising a coupling portion (2300) configured to receive the measurement device (1000); a second electrical connector (2280, 2280 ', 2280' '); and an electronic control unit (ECU) (2200) electrically connected to the second electrical connector and configured to transmit one or more control signals to the measurement device and to receive one or more measurement signals from the measurement device. The system (100) comprises a measurement device (1000) and a control device (2000).

Description

Field of the technology

[0001] This specification relates to measuring devices and systems for measuring fluid flow. Background art

[0002] Flow meters are used to measure the amount of fluid flowing through a pipe section of, for example, a fluid pipeline or a fluid circuit. The fluid to be measured can generally include, for example, liquids, gases, and combinations thereof. Fluid flow can be measured based on different principles, such as using mechanical flow meters, pressure-based flow meters, electromagnetic flow meters, and ultrasonic flow meters, etc. Different principles have characteristics that are more or less well-suited to different applications. Some applications require measuring large amounts of fluid, some other applications require high precision, and still some other applications require that the fluid pipeline and the flow meter meet specific requirements regarding disinfection and the like.

[0003] In some examples, a flow meter is configured to receive a fluid pipeline (e.g., a "clamp-on" flow meter) in a corresponding recess and has one or more sensors for determining the fluid flow of the material flowing through the fluid pipeline. Measuring fluid flow characteristics using a clamp-on flow meter may depend on several factors, including the characteristics of the fluid pipeline material (e.g., wear resistance, hardness, flexibility, durability), the characteristics of the fluid flow flowing through the fluid pipeline (e.g., viscosity, pressure, temperature, and their variations), and the operating characteristics of the fluid system (e.g., vibration). Therefore, the quality of fluid flow measurement by using a clamp-on flow meter may vary with these and other factors.

[0004] In addition, flexible fluid pipelines using clamp-on flow meters are generally limited in terms of the maximum pressure of the fluid to be measured. In some examples, reinforced fluid pipelines are used for applications involving fluids with larger pressures. However, such reinforcement may have an adverse effect on fluid flow measurement when, for example, the reinforcement measures (e.g., fabric, reinforcing material, increased wall thickness) weaken or otherwise affect the signal used to measure fluid flow. This may result in insufficient reproducibility of fluid flow measurement. Summary of the invention

[0005] Generally, an innovative aspect of the subject matter described in this specification can be embodied as a measuring device configured to be coupled to a control device. The measuring device includes: a fluid conduit, a first electrical connector, a first ultrasonic transducer and a second ultrasonic transducer, and an acoustic coupling medium. The first and second ultrasonic transducers are electrically connected to the first electrical connector respectively, and the acoustic coupling medium couples the first and second ultrasonic transducers to the fluid conduit. The first ultrasonic transducer is configured to emit an ultrasonic signal along a sound path in response to receiving a control signal, and the sound path extends from the first ultrasonic transducer through the acoustic coupling medium to the second ultrasonic transducer. The second ultrasonic transducer is configured to receive the ultrasonic signal transmitted along the sound path and generate a measurement signal based on the received ultrasonic signal. The fluid conduit is at least partially disposed along the sound path such that the emitted ultrasonic signal propagates along the sound path and impinges on the medium to be measured in the measurement section of the fluid conduit.

[0006] In a second aspect according to the first aspect, the acoustic coupling medium includes a first part and a second part. The first part couples the first ultrasonic transducer to the fluid conduit, and the second part couples the second ultrasonic transducer to the fluid conduit.

[0007] In a third aspect according to the second aspect, the measuring device further includes an air backing, which is positioned adjacent to the fluid conduit and separates the first part of the acoustic coupling medium from the second part of the acoustic coupling medium.

[0008] In a fourth aspect according to the third aspect, the air backing is configured to acoustically decouple the first part of the acoustic coupling medium from the second part of the acoustic coupling medium such that the ultrasonic signal propagating along the sound path does not directly propagate from the first part to the second part.

[0009] In a fifth aspect according to any one of the second to fourth aspects, the sound path extends from the first ultrasonic transducer through the first part of the acoustic coupling medium, through the measurement section, and through the second part of the acoustic coupling medium to the second ultrasonic transducer.

[0010] In a sixth aspect according to any of the foregoing aspects, the acoustic coupling medium includes a thermoplastic material. Preferably, the thermoplastic material includes epoxy resin and / or is substantially homogeneous.

[0011] In a seventh aspect according to any of the foregoing aspects, the measuring device further includes a printed circuit board (PCB), which includes the first electrical connector and is configured to electrically connect the first and second ultrasonic transducers to the first electrical connector.

[0012] In an eighth aspect according to the seventh aspect, each of the first and second ultrasonic transducers is mechanically connected to the PCB.

[0013] In a ninth aspect according to the seventh aspect, the first ultrasonic transducer and the first connection portion of the first ultrasonic transducer form a first transducer module, and the second ultrasonic transducer and the second connection portion of the second ultrasonic transducer form a second transducer module.

[0014] In a tenth aspect according to the ninth aspect, the first and second connection portions of the PCB are configured to electrically and mechanically connect the first and second ultrasonic transducers to the PCB.

[0015] In an eleventh aspect according to any one of the seventh to tenth aspects, the first and second connection portions of the PCB are configured to electrically and mechanically connect the first and second ultrasonic transducers to the PCB.

[0016] In a twelfth aspect according to any one of the seventh to eleventh aspects, the first electrical connector includes one or more of a USB-C connector, a USB-A connector, a USB-B connector, a micro-USB connector, a mini-USB connector, an HDMI connector, and a SUB-D connector.

[0017] In a thirteenth aspect according to any one of the first to eleventh aspects, the first electrical connector includes a first coil and a second coil.

[0018] In a fourteenth aspect according to the thirteenth aspect, the first coil is configured to be inductively coupled to the first coil of the control device, and the second coil is configured to be inductively coupled to the second coil of the control device.

[0019] In a fifteenth aspect according to the fourteenth aspect, the first electrical connector includes a third coil, and the third coil is configured to be inductively coupled to the third coil of the control device.

[0020] In a sixteenth aspect according to any one of the foregoing aspects combining the seventh and thirteenth aspects, the PCB includes the first coil and the second coil of the first electrical connector, and optionally includes the third coil of the first electrical connector.

[0021] In a seventeenth aspect according to any one of the foregoing aspects, the first electrical connector is configured to distribute electrical signals. Optionally, the electrical signals include control signals and measurement signals.

[0022] In an eighteenth aspect according to any one of the foregoing aspects, the first electrical connector is configured to be connected to the second electrical connector of the control device.

[0023] In a nineteenth aspect according to any one of the foregoing aspects, the first ultrasonic transducer is configured to receive a control signal from the control device through the first electrical connector. Additionally or alternatively, the second ultrasonic transducer is configured to send a measurement signal to the control device through the first electrical connector.

[0024] In aspect 20 according to any of the foregoing aspects, the measuring device further comprises one or more sensors. The one or more sensors include one or more of a temperature sensor, a pressure sensor, a conductivity sensor, and an optical sensor.

[0025] In aspect 21 according to any of the foregoing aspects, the inner diameter of the fluid conduit is in the range of 0.1 inches to 0.5 inches (0.254 cm to 1.27 cm). Preferably, the inner diameter is 0.25 inches (0.635 cm). Alternatively, the inner diameter of the fluid conduit is in the range of 0.5 inches to 1.5 inches (1.27 cm to 3.81 cm). Preferably, the inner diameter is 1 inch (2.54 cm).

[0026] In aspect 22 according to any of the foregoing aspects, the fluid conduit has a first end and a second end, the first end and the second end being in fluid communication with each other and configured to be attached to a fluid circuit.

[0027] In aspect 23 according to the foregoing aspect, the first end and / or the second end includes one of the following: a sanitary connector, a sterile quick connector, and an MPX plug.

[0028] In aspect 24 according to any of the foregoing aspects, the measuring device further comprises a body.

[0029] In aspect 25 according to the foregoing aspect, the body includes a coupling portion configured to couple the measuring device to a control device.

[0030] In aspect 26 according to any of aspects 24 or 25 foregoing, the body defines the fluid conduit as a part of the body.

[0031] In aspect 27 according to any of aspects 24 to 26 foregoing, the body is configured to position the PCB fixedly relative to the fluid conduit.

[0032] In aspect 28 according to any of the foregoing aspects, the first ultrasonic transducer and the second ultrasonic transducer are fixedly positioned relative to the fluid conduit through an acoustic coupling medium.

[0033] In aspect 29 according to any of the foregoing aspects, the measuring device is configured for applications in the medical and / or pharmaceutical fields.

[0034] In aspect 30, another innovative aspect of the subject matter described in this specification can be embodied as a control device, comprising: a housing including a coupling portion for receiving the measuring device; a second electrical connector; an electronic control unit ECU electrically connected to the second electrical connector and configured to send one or more control signals to the measuring device and receive one or more measurement signals from the measuring device.

[0035] In a 31st aspect according to the foregoing aspects, the coupling portion includes a locking mechanism configured to selectively lock the measuring device in a coupled position or selectively unlock the measuring device when coupled to the control device.

[0036] In a 32nd aspect according to the foregoing aspects, the locking mechanism includes a bayonet locking mechanism.

[0037] In a 33rd aspect according to any one of the foregoing 31st or 32nd aspects, a switch is further included, the switch being configured to selectively lock and unlock the locking mechanism. Optionally, selectively locking and unlocking includes tactile and / or audible feedback.

[0038] In a 34th aspect according to any one of the foregoing 30th to 33rd aspects, the control device further includes a cover configured to cover at least a portion of the coupling portion.

[0039] In a 35th aspect according to the foregoing aspects, the cover is configured to cover the second electrical connector in the absence of a measuring device being coupled to the control device.

[0040] In a 36th aspect according to any one of the foregoing 30th to 35th aspects, the control device further includes a status indicator connected to the ECU and configured to indicate an operating state of the control device and / or an operating state of the measuring device when coupled to the control device.

[0041] In a 37th aspect according to any one of the foregoing 30th to 36th aspects, the second electrical connector is configured to distribute electrical signals. Optionally, the electrical signals include control signals and measurement signals.

[0042] In a 38th aspect according to any one of the foregoing 30th to 37th aspects, when the measuring device is coupled to the control device, the control device is configured to send a control signal to the control device and receive a measurement signal from the measuring device, the measurement signal indicating a characteristic of a fluid flow in a measurement section of a fluid conduit of the measuring device.

[0043] In a 39th aspect according to any one of the foregoing 30th to 38th aspects, the second electrical connector includes one or more of a USB-C connector, a USB-A connector, a USB-B connector, a micro-USB connector, a mini-USB connector, an HDMI connector, and a SUB-D connector.

[0044] In a 40th aspect according to any one of the foregoing 30th to 39th aspects, the second electrical connector includes a first coil and a second coil.

[0045] In a 41st aspect according to any one of the foregoing aspects 30 to 40, the first coil is configured to be inductively coupled to a first coil of a measuring device, and the second coil is configured to be inductively coupled to a second coil of the measuring device.

[0046] In a 42nd aspect according to any one of the foregoing aspects 30 to 41, the first electrical connector includes a third coil configured to be inductively coupled to a third coil of the measuring device.

[0047] In a 43rd aspect according to any one of the foregoing aspects 30 to 42, the control device is configured to determine one or more of the following based on the inductive coupling between the third coil of the control device and the third coil of the measuring device: whether there is a coupled measuring device, the operating state of the coupled measuring device, and the type of the coupled measuring device.

[0048] In a 44th aspect according to any one of the foregoing aspects 30 to 43, the ECU includes the first coil of the second electrical connector and the second coil of the second electrical connector, and optionally includes the third coil of the second electrical connector.

[0049] In a 45th aspect according to any one of the foregoing aspects 30 to 44, the second electrical connector is configured to distribute electrical signals. Optionally, the electrical signals include control signals and measurement signals.

[0050] In a 46th aspect according to any one of the foregoing aspects 30 to 45, the second electrical connector is configured to be connected to the first electrical connector of the measuring device.

[0051] In a 47th aspect according to any one of the foregoing aspects 30 to 46, the ECU includes a function for controlling one or more sensors of the measuring device and receiving measurement signals for the one or more sensors. The one or more sensors include one or more of a temperature sensor, a pressure sensor, a conductivity sensor, and an optical sensor.

[0052] In a 48th aspect according to any one of the foregoing aspects 30 to 47, the control device is at least partially made of a component containing stainless steel.

[0053] In a 49th aspect according to any one of the foregoing aspects 30 to 48, the control device is configured for applications in the medical and / or pharmaceutical fields.

[0054] In a 50th aspect, another innovative aspect of the subject matter described in this specification can be embodied as a fluid flow measurement system. The system includes a measuring device according to any one of aspects 1 to 29, and a control device according to any one of aspects 30 to 49.

[0055] In a 51st aspect, another innovative aspect of the subject matter described in this specification can be embodied as a method of manufacturing a measuring device according to any one of the 1st to 29th aspects. The method includes preparing the inner surface of the body of the measuring device for casting a thermoplastic resin; positioning the PBC of the measuring device relative to the body; performing the casting of the thermoplastic resin, and performing the curing of the thermoplastic resin.

[0056] In a 52nd aspect according to the foregoing 51st aspect, the method further includes arranging a first ultrasonic transducer and a second ultrasonic transducer relative to the body.

[0057] Optionally, the foregoing and other embodiments may each independently or in combination include one or more of the foregoing features. In particular, one embodiment includes a combination of all the following features.

[0058] The subject matter described in this specification can be implemented in a particular embodiment to achieve one or more of the following advantages. A fluid flow measurement system and / or device can be provided, which facilitates more accurate and / or reliable measurement of fluid flow. In addition, a measuring device for measuring fluid flow can be provided, which can be easily and reliably coupled to a control device for measuring fluid flow. In addition, a control device for measuring fluid flow can be provided, which can accommodate any one of a plurality of different measuring devices for measuring fluid flow. In addition, a system and / or control device for measuring fluid flow can be provided, which can achieve easier and / or more effective maintenance. In addition, a system and / or control device for measuring fluid flow can be provided, which can operate reliably for a long time.

[0059] Details of one or more embodiments of the subject matter of this specification are set forth in the accompanying drawings and the following description. Other features, aspects, and advantages of the subject matter will become apparent from the description, the drawings, and the claims. BRIEF DESCRIPTION OF THE DRAWINGS

[0060] Figure 1 A perspective view of a device for measuring fluid flow according to an embodiment of this specification is shown;

[0061] Figure 2 A perspective view of a measuring device for measuring fluid flow according to an embodiment of this specification is shown;

[0062] Figure 2 A shows according to an embodiment of this specification Figure 2 A partial side view of the printed circuit board shown;

[0063] Figure 3 A perspective view of a control device for measuring fluid flow according to an embodiment of this specification is shown;

[0064] Figure 3AShows a perspective view of a system for measuring fluid flow according to an embodiment of the present specification;

[0065] Figure 4A Shows a perspective view of a control device for measuring fluid flow according to an embodiment of the present specification;

[0066] Figure 4B Shows a perspective view of a control device for measuring fluid flow according to an embodiment of the present specification;

[0067] Figure 5 Shows a cross-sectional view of a device for measuring fluid flow according to a first embodiment of the present specification;

[0068] Figure 5A Shows a front perspective view and a rear view of a transducer module according to an embodiment of the present specification;

[0069] Figure 5B Shows a perspective view of a transducer module located on a PCB according to an embodiment of the present specification;

[0070] Figure 5C Shows a top view of a connector located on a PCB and configured to accommodate a transducer module according to an embodiment of the present specification;

[0071] Figure 6 Shows a cross-sectional view of a device for measuring fluid flow according to a second embodiment of the present specification;

[0072] Figure 7 Shows a cross-sectional view of a measuring device and a control device for measuring fluid flow according to a first embodiment of the present specification, wherein a second variant of the electrical connection is shown;

[0073] Figure 8 Shows a circuit schematic diagram of the electrical connection of a measuring device and a control device for measuring fluid flow according to a first embodiment of the present specification;

[0074] Figure 9 Shows a cross-sectional view of a measuring device for measuring fluid flow according to a first embodiment of the present specification, wherein a third variant of the electrical connection is shown;

[0075] Figure 10 Shows a circuit schematic diagram of a circuit for detecting a measuring device according to an embodiment of the present specification;

[0076] Figure 11 Shows a circuit schematic diagram of a circuit for detecting a measuring device according to an embodiment of the present specification;

[0077] Figure 12A Shows a bottom view of a measuring device for measuring fluid flow according to an embodiment of the present specification;

[0078] Figure 12B shows a perspective view of a control device for measuring a fluid flow according to an embodiment of the present specification;

[0079] Figure 13 shows a process diagram for determining the pair of ultrasonic transducers used according to an embodiment of the present specification;

[0080] Figure 14 is a flowchart of an exemplary manufacturing process of a measuring device 1000 according to an embodiment of the present specification; and,

[0081] Figure 15 shows a cross-sectional view of a device for measuring a fluid flow according to a first embodiment of the present specification.

[0082] In the respective drawings, the same reference numerals and names denote the same elements. Detailed Description

[0083] Figure 1 shows a perspective view of a device 1000 for measuring a fluid flow according to an embodiment of the present specification. In the present specification, the device 1000 for measuring a fluid flow may be referred to as a "measurement" device 1000 or a "single-use" device 1000. As further described below, a system 100 for measuring a fluid flow includes a measurement device 1000 (e.g., see Figure 1 , Figure 2 , Figure 12A ) and a control device 2000 (e.g., see Figure 3 , Figure 4, Figure 12B ). Without general limitation, the measurement device 1000 is designated as single-use and / or used for a limited time period (e.g., used once or continuously within a time period of one or more hours to one day or more days). In some examples, the measurement device 1000 is designated as single-use within up to 30 days and cannot be reused. Without general limitation, the control device 2000 is designated as multi-use and / or long-term (continuous) use (e.g., operating in combination with a plurality of single-use or measurement devices 1000 for several years). Embodiments of the measurement device 1000, the control device 2000, and the system 100 are described in detail below.

[0084] Figure 1 shows a perspective view of the outside of the measurement device 1000, where "outside" means that the measurement device 1000 is coupled to the control device 2000 ( Figure 1The installation structure (not shown in the figure) is provided. In some embodiments, the control device 2000 is positioned such that the mounting surface 2310 extends in a substantially vertical plane, and the outer side of the measuring device 1000 also extends in a substantially vertical plane. In such embodiments, the outer side faces away from the mounting surface 2310 of the control device 2000 (e.g., faces forward, towards the operator of devices 1000 and 2000).

[0085] In other embodiments, the control device 2000 is positioned such that the mounting surface 2310 extends in a substantially horizontal plane, and the outer side of the measuring device 1000 also extends in a substantially horizontal plane. In such embodiments, the outer side faces away from the mounting surface 2310 of the control device 2000 (e.g., faces upward, towards the operator of devices 1000 and 2000).

[0086] The measuring device 1000 includes a main body 1100 that defines a fluid conduit 1200 having a respective first end 1210 and a respective second end 1220. The fluid conduit 1200 is configured to receive fluid, such as the medium to be measured, at one of the first end 1210 and the second end 1220, and release the fluid at the other of the first end 1210 and the second end 1220. In some embodiments, the direction of the fluid flow through the fluid conduit 1200 has a preferred or desired direction, such as flowing from the first end 1210 to the second end 1220. The fluid conduit 1200 further includes a measurement section 1230 that is located between the first end 1210 and the second end 1220. In some embodiments, the measurement section 1230 is substantially located at the center of the main body 1100. Figure 1 The measurement section 1230 is schematically shown for illustrative purposes only. Figure 1 The measurement section 1230 schematically shown in the figure does not specifically limit the size, shape, form, or position of the measurement section 1230. In some embodiments, the measurement section 1230 is substantially defined by the characteristics and arrangement of ultrasonic transducers 1410, 1420 ( Figure 1 not shown in the figure), as further described below.

[0087] Depending on the corresponding application for measuring the fluid flow, the fluid conduit 1200 and / or other components of the measuring device 1000 can be adapted accordingly. In one aspect, the size of the fluid conduit 1200 can be adapted to the specific characteristics of the corresponding application for measuring the fluid flow and / or the medium to be measured. For example, on the one hand, at low volumetric flow rates, it may be difficult to achieve the desired resolution or accuracy of fluid flow measurement because the low flow velocity cannot be well resolved in a timely manner. On the other hand, at high volumetric flow rates, the dynamic pressure in the conduit may increase to an extent that may damage the fluid medium. Using fluid conduits of different diameters can reduce or eliminate such effects in applications where low volumetric flow rates or high volumetric flow rates are to be measured.

[0088] For example, for applications where lower volumetric flow rates are to be measured, the measuring device 1000 can have a body 1100 that defines a fluid conduit 1200 having a relatively small diameter. In some embodiments for measuring lower volumetric flow rates, the diameter of the fluid conduit 1200 can be between 0.1 inches and 0.5 inches (between 0.254 cm and 1.27 cm), preferably 1 / 4 inch (0.635 cm). In some examples, depending on the inner diameter of the fluid conduit 1200, lower volumetric flow rates refer to flow rates in the range of 1 ml / min to 8000 ml / min. For example, for applications where higher volumetric flow rates are to be measured, the measuring device 1000 can have a body 1100 that defines a fluid conduit 1200 having a relatively large diameter. In some embodiments for measuring higher volumetric flow rates, the diameter of the fluid conduit 1200 can be between 0.5 inches and 1.5 inches (between 1.27 cm and 3.81 cm), preferably 1 inch (2.54 cm). In some examples, depending on the inner diameter of the fluid conduit 1200, higher volumetric flow rates refer to flow rates in the range of 150 ml / min to 120000 ml / min.

[0089] The device 1000 having a body 1100 that defines a fluid conduit 1200 with a relatively small diameter and used for measuring lower volumetric flow rates generally exhibits higher resolution or accuracy at such lower volumetric flow rates (e.g., 3% or lower, preferably 1% or lower). Due to the fluid flow being restricted by the relatively small diameter of the fluid conduit 1200, and / or due to potential damage to the fluid medium to be measured caused by, for example, excessive pressure, such a device 1000 may not be able to measure higher volumetric flow rates.

[0090] The main body 1100 has a fluid conduit 1200 with a defined larger diameter, and a device 1000 for measuring a relatively high volumetric flow rate typically exhibits lower resolution or accuracy at relatively low volumetric flow rates (e.g., 250 ml / min or less). However, as the volumetric flow rate increases, the resolution or accuracy of such a device 1000 generally improves. Such a device 1000 is capable of measuring relatively low volumetric flow rates, but with lower resolution or accuracy.

[0091] In some embodiments, the fluid conduit 1200 is in the form of a straight channel or straight pipeline between a corresponding first end 1210 and a second end 1220. This can reduce or eliminate disturbances in the fluid flow distribution through the fluid conduit 1200.

[0092] The first end 1210 and the second end 1220 of the fluid conduit 1200 are respectively configured to be connected to corresponding fluid pipelines of a fluid circuit. To this end, the first end 1210 and the second end 1220 of the fluid conduit 1200 may be provided with corresponding shapes or connectors. In Figure 1 and Figure 2 the illustrated embodiment, the first end 1210 and the second end 1220 of the fluid conduit 1200 are in the form of hose barbs (or "single barbs") configured to receive or connect to a hose or flexible fitting. The use of hose barb connectors and corresponding flexible tubes may involve one or more of the following issues. Reverse assembly of the measuring device 1000 in the fluid circuit may cause fluid and / or circuit contamination because connecting a fitting to a hose barb connector requires opening the circuit and attaching the fitting to the hose barb connector. This can be avoided by using a connector with a seal that is broken when the fitting is connected to the device (such as an Aseptic Quick Connector or an MPX plug). As another example, the flexible fitting may be attached to the measuring device 1000 in an undesirable manner, such as including incomplete connection of the fitting to the connector, or extending at an angle or bending from the connector. In such cases, the fluid flow through the fluid conduit 1200 may be impaired, potentially resulting in disturbances in the flow distribution and / or an increase in the shear force of the medium to be measured. This may have a negative impact on the measurements performed using the measuring device 1000. In yet another example, in some applications, not only the volumetric flow rate is to be measured, but also other characteristics of the medium to be measured are to be monitored, such as checking for the potential presence of bubbles in the medium. To reliably detect bubbles in the medium to be measured, the fluid flow through the fluid conduit 1200 should be free of disturbances and as smooth as possible.

[0093] In other embodiments, the first end 1210 and the second end 1220 of the fluid conduit 1200 may be provided with corresponding connectors, including but not limited to sanitary connectors, Aseptic Quick Connectors, MPX plugs, and other connectors.

[0094] In some embodiments, the main body 1100 is provided with a covering member 1150. The covering member 1150 is used to protect the outer surface of the measuring device 1000 and / or the main body 1100. In addition, marks, labels, etc. may be provided on the covering member 1150 to indicate the characteristics or usage instructions of the measuring device 1000, etc.

[0095] Figure 2 A perspective view of a measuring device 1000 for measuring a fluid flow according to an embodiment of the present specification is shown. Figure 2 A perspective view of the coupling side of the measuring device 1000 is shown, where the "coupling side" refers to the mounting configuration in which the measuring device 1000 is coupled to a control device 2000 ( Figure 2 not shown in the figure). In some embodiments, the control device 2000 is positioned such that it has a mounting surface 2310 extending in a substantially vertical plane, so that the coupling side of the measuring device 1000 also extends substantially along the substantially vertical plane and faces the mounting surface 2310 of the control device 2000 (e.g., away from the operator of the devices 1000, 2000).

[0096] In Figure 2 the illustrated embodiment, the main body 1100 has a coupling side 1300 which is provided with mounting means 1320 configured to engage with corresponding mounting means 2320 of the control device 2000, where the measuring device 1000 is configured to be mounted to the mounting means 2320. In the illustrated embodiment, the mounting means 1320 includes radially protruding protrusions configured to engage with the mounting means 2320 of the control device 2000. In some embodiments, radially protruding protrusions are provided along the perimeter of the main body 1100. The distance between adjacent radially protruding protrusions may be configured to limit the measuring device 1000 to be inserted and / or mounted relative to the mounting means 2320 of the control device 2000 in a single position and / or in a single orientation to prevent incorrect or improper installation of the measuring device 1000.

[0097] Figure 2Shows an exemplary configuration of a printed circuit board (PCB) 1400 associated with the main body 1100. The PCB 1400 is coupled to the main body 1100 on the coupling side of the measuring device 1000 and, when coupled to the measuring device 1000, faces the mounting surface 2310 of the control device 2000. The PCB 1400 is arranged relative to the main body 1100 and the fluid conduit 1200 such that the PCB 1400 extends in a plane substantially parallel to the longitudinal axis of the fluid conduit 1200, wherein the first end 1401 and the second end 1402 of the PCB 1400 extend beyond the fluid conduit 1200 when viewed from the coupling side of the measuring device 1000. The PCB 1400 is also arranged on the coupling side of the measuring device 1000, facing the mounting surface 2310 of the control device 2000, and is located between the fluid conduit 1200 and the mounting surface 2310 when mounted on the mounting surface 2310.

[0098] The PCB 1400 includes an electrical connector 1480 that is configured to connect to a corresponding electrical connector 2280 of the control device 2000. In some embodiments, the electrical connector 1480 extends from the PCB 1400 in a direction substantially perpendicular to the plane in which the PCB 1400 lies and / or extends towards the coupling side of the measuring device 1000. The electrical connector 1480 is generally configured to face the mounting surface 2310 of the control device 2000 when the measuring device 1000 is coupled to the mounting surface 2310 of the control device 2000, such that when the measuring device 1000 is mounted, according to a first variant, an electrical connection 1480, 2280 is achieved between the electrical connector 1480 of the measuring device 1000 and the electrical connector 2280 of the control device 2000.

[0099] In some embodiments, the electrical connector 1480 may include a USB-C connector (e.g., a USB-C plug). The electrical connector 2280 may include a USB-C connector (e.g., a USB-C socket). Alternative electrical connectors (e.g., male / female, plug / socket) may include, but are not limited to, USB-A, USB-B, Micro USB, MiniUSB, HDMI and its variants, and SUB-D.

[0100] In some embodiments, the electrical connection 1480, 2280 has one or more of the following characteristics. The electrical connection 1480, 2280 includes a plurality of electrical contacts (e.g., contact pins), preferably at least 4 electrical contacts, more preferably at least 8 electrical contacts. The electrical contacts are suitable for signal transmission using low voltage (e.g., safety extra-low voltage, SELV). The electrical contacts have a low contact resistance and / or a low inherent capacitance. The electrical connector 1480 and the electrical connector 2280 are designed for a large number of mating cycles (e.g., at least 10,000 mating cycles).

[0101] Figure 2 A fluid conduit 1200 is shown that extends from a first end 1210 through a body 1100 to a second end 1220. Generally, the fluid conduit 1200 is configured to allow fluid to flow smoothly through the fluid conduit 1200. In some embodiments, the fluid conduit 1200 is defined as a substantially straight tube or pipe between the first end 1210 and the second end 1220. In the direction in which fluid flows through the fluid conduit 1200 (e.g., from the first end 1210 to the second end 1220, or vice versa), the diameter of the fluid conduit 1200 is substantially the same. This can reduce or eliminate disruptions as the medium flows through the fluid conduit 1200.

[0102] Figure 2 A shows an embodiment in accordance with the present invention Figure 2 A partial side view of the PCB 1400 shown. In some embodiments, the electrical connector 1480 is coupled to the PCB 1400 based on a "hot melt" process. Preferably, according to ASTM D2240, the Shore hardness A of the hot melt material is in the range of 60 to 80. This coupling seals the connection between the electrical connector 1480 and the PCB 1400 and can bring at least two effects. On the one hand, this electrically insulates the connection and allows for thermoplastic casting (e.g., epoxy casting) of the PCB 1400 and the body 1100 of the measuring device 1000 to position the PCB 1400 and all associated components fixedly relative to the body 1100 and / or the fluid conduit 1200. On the other hand, this allows the electrical connector 1480 to be mechanically mounted to the PCB 1400 in a fixed manner such that when the measuring device 1000 is coupled to the control device 2000, an electrical connection 1480, 2280 can be more easily formed (e.g., without the need to connect the electrical connectors 1480 and 2280 in separate manual steps).

[0103] Figure 3 A perspective view of a control device 2000 for measuring fluid flow in accordance with an embodiment of the present specification is shown. The control device 2000 includes a housing 2100 and a coupling portion 2300. The coupling portion 2300 includes a mounting surface 2310 and a mounting device 2320. The mounting device 2320 is configured to engage a corresponding mounting device 1320 of the measuring device 1000 when the measuring device 1000 is coupled to the control device 2000.

[0104] In some embodiments, the coupling portion 2300 includes a bayonet lock that can be operated by a switch 2360 (such as a slider, pusher, or other handle) to lock or unlock the measuring device 1000 to an appropriate position when the measuring device 1000 is coupled to the control device 2000. The switch 2360 can be operated from an unlocked position to a locked position. In the unlocked position, the measuring device 1000 can be installed on or removed from the control device 2000. In the locked position, the measuring device 1000 is locked in place and cannot be removed from (or installed on) the control device 2000, and vice versa. In some embodiments, the switch 2360 can be configured to automatically engage from the unlocked position to the locked position when the measuring device 1000 is inserted into the coupling portion 2300 of the device 2000 or when the measuring device 1000 engages the mounting surface 2310 of the device 2000. The automatic lock can be implemented in the form of a spring-loaded mechanism, where the biasing spring is released when the switch 2360 is (manually) unlocked and the spring is released when the measuring device 1000 is inserted / engaged.

[0105] In some embodiments, the switch 2360 and / or the coupling portion 2300 are configured to provide tactile feedback and / or audible feedback. For example, the switch 2360 and / or the coupling portion 2300 are configured to provide an obvious click sound (such as tactile / tactile, audible; to be perceived by the operator of the measuring device 1000) when the switch 2360 is placed in a first end position (such as a coupling position or an unlocked position), thereby enabling the coupling of the measuring device 1000 to the control device 2000. In addition, the switch 2360 and / or the coupling portion 2300 are configured to provide an obvious click sound (such as tactile / tactile, audible; to be perceived by the operator of the measuring device 1000) when the switch 2360 is placed in a second end position (such as a locked position) after the measuring device 1000 is successfully coupled to the control device 2000 and locked in place.

[0106] In Figure 3 In the illustrated embodiment, the mounting device 2320 includes circumferentially arranged radial recesses configured to receive corresponding radially protruding protrusions of the mounting device 1320 of the measuring device 1000. In some embodiments, the recesses of the mounting device 2320 are provided along the inner circumference of the coupling portion 2300. The distance between adjacent recesses can be configured to limit the insertion and / or installation of the measuring device 1000 relative to the mounting device 2320 of the control device 2000 to a single position and / or in a single orientation to prevent incorrect or improper installation of the measuring device 1000.

[0107] In some embodiments, the control device 2000 at least partially includes stainless steel components. This can improve the long-term robustness and reliability of the control device 2000. This can also improve the cleaning and / or maintenance of the control device 2000, for example when cleaning, preparing, and / or maintaining the control device 2000 between operating cycles, and / or when one measuring device 1000 is replaced by another measuring device 1000. For example, a major part of the coupling portion 2300, in particular the mounting surface 2310, the switch 2360, the cover 2380, and / or the mounting device 2320, can at least partially include stainless steel or stainless steel components.

[0108] The control device 2000 further includes an electronic control unit (ECU) 2200 ( Figure 3 not shown in the figure), and the ECU 2200 is configured to connect to the measuring device 1000 or to a component of the measuring device 1000 when the measuring device 1000 is coupled to the control device 2000. The control device 2000 and / or the ECU 2200 are configured to control the measuring device 1000 when the measuring device 1000 is coupled to the control device 2000. For example, the control device 2000 and / or the ECU 2200 are configured to send one or more control signals to the measuring device 1000 and / or receive one or more measurement signals from the measuring device 1000 when the measuring device 1000 is coupled to the control device 2000.

[0109] The control device 2000 and / or the ECU 2200 further include an electrical connector 2280, and the electrical connector 2280 is configured to establish electrical connections 1480, 2280 when the measuring device 1000 is coupled to the control device 2000. The electrical connector 2280 is coupled to the control device 2000 and / or the ECU 2200 in a floating mounting manner, thereby allowing the electrical connector 1480 (mounted on the PCB 1400 of the measuring device 1000 coupled to the control device 2000) to be received, so that when the measuring device 1000 is coupled to the control device 2000, the electrical connections 1480, 2280 can be more easily formed (for example, when the electrical connectors 1480 and 2280 are not fully aligned and / or not aligned with high precision).

[0110] The control device 2000 and / or the ECU 2200 are provided with one or more interfaces, and the one or more interfaces are configured to perform data communication with one or more other components (such as a network computer, other control units, data storage devices). The one or more interfaces may include one or more of the following: Power over Ethernet (PoE), Controller Area Network (CAN) bus, Inter-IC (I 2C) Bus, UART, Serial Peripheral Interface (SPI), Analog 4 - 20mA. The control device 2000 and / or the ECU 2200 may be provided with one or more other components, including but not limited to an Electrically Erasable Programmable Read - Only Memory (EEPROM), additional sensors such as temperature, pressure, and conductivity sensors, and components configured to control the additional sensors or otherwise communicate with the additional sensors (e.g., configured to send control signals to the additional sensors and receive measurement signals from the additional sensors).

[0111] In some embodiments, the control device 2000 includes a status indicator 2210 that is connected to the ECU 2200 and is configured to indicate the operating status of the control device 2000 and / or the operating status of the measuring device 1000 when the measuring device 1000 is coupled to the control device 2000. In some embodiments, the status indicator 2210 includes a Light - Emitting Diode (LED) or a similar light - emitting body that is configured to emit light of different wavelengths and / or one or more light pulses indicating the operating status of the control device 2000 and / or the operating status of the measuring device 1000 when the measuring device 1000 is coupled to the control device 2000. In some embodiments, the operating status indicated by the status indicator 2210 includes one or more of the following: the health or error condition of the ECU 2200 (e.g., boot system, system error), the health or error condition of the measuring device 1000 and / or the control device 2000 (e.g., ready for operation, measuring device 1000 coupled to control device 2000, presence of the medium to be measured in the fluid conduit 1200).

[0112] The control device 2000 may also include a cover member 2330 (such as a flap, lid), which is configured to cover at least a portion of the coupling portion 2300 and / or the mounting surface 2310. In particular, the cover member 2330 may be configured to cover the electrical connector 2280 of the control device 2000 when not in use (such as when no measuring device 1000 is coupled to the control device 2000). In some embodiments, the cover member 2330 may include a seal 2380, which is configured to seal the electrical connector 2280 when the cover member 2330 is configured to cover at least a portion of the coupling portion 2300 and / or the mounting surface 2310. The seal may be configured to meet specific ingress protection (IP) specifications, such as IPX5, as defined by the International Electrotechnical Commission (IEC) according to the international standard IEC 60529, or as defined by the European Union through the European Committee for Electrotechnical Standardization (CENELEC) according to EN 60529. The cover member 2330 may protect the electrical connector 2280 and / or at least a portion of the coupling portion 2300 and / or the mounting surface 2310 from, for example, contaminants, fluids, splashing water, dust or particles. In particular, during the cleaning process of the control device 2000, the cover member 2330 may protect the electrical connector 2280 and / or at least a portion of the coupling portion 2300 and / or the mounting surface 2310. In some embodiments, the cover member 2330 is implemented as a flip or lid-type cover, which can be pivotally mounted to the housing 2100 of the control device 2000 or the coupling portion 2300. In other embodiments, the cover member 2330 may be implemented as a removable cover, such as in the form of a simple releasably attached cover plate or in the form of a "dummy device" (such as having a body but no fluid conduit 1200 and / or its first end 1210 and second end 1220), and is coupled to the control device 2000 in the same or a similar manner as the measuring device 1000 is coupled to the control device 2000. Figure 3 Device 2000 is shown with the cover member 2330 in the open position, where the measuring device 1000 may be coupled to the control device 2000.

[0113] Figure 3A A perspective view of a system 100 for measuring fluid flow according to an embodiment of the present specification is shown. System 100 includes a control device 2000 and a measuring device 1000. In Figure 3A the illustrated embodiment, the control device 2000 has a cover member 2330 and is shown in an orientation such that the cover member is pivotally attached to the bottom side of the control device 2000. In other embodiments, the cover member 2330 may be attached to the top side of the control device 2000. In Figure 3AIn the configuration shown, the measuring device 1000 is coupled to the control device 2000. In some embodiments, when the measuring device 1000 is coupled to the control device 2000, the cover 2330 may be in an engaged position relative to the measuring device 1000. In the engaged position, the cover 2330 engages the measuring device 1000 such that the cover 2330 remains in place. During operation, a fluid line ( Figure 3A not shown) will be connected to the measuring device 1000 of the system 100.

[0114] Figure 4A A perspective view of a control device 2000 for measuring a fluid flow in accordance with an embodiment of the present specification is shown. Figure 4A A view is shown as described above with respect to Figure 3 the control device 2000 described. As Figure 4A shown, when no device 1000 is coupled to the control device 2000, the cover 2330 is in a closed position, in which the cover 2330 covers (e.g., shields, protects, seals) a portion of the coupling portion 2300 and / or the mounting surface 2310 of the control device 2000, particularly the electrical connector 2280 of the control device 2000.

[0115] Figure 4B A perspective view of a control device 2000 for measuring a fluid flow in accordance with an embodiment of the present specification is shown. In some embodiments, the control device 2000 includes a display device 2150 configured to provide a user interface 2155. The display device 2150 is configured to display information to an operator of the control device 2000, the measuring device 1000, or the system 100. In some embodiments, the user interface 2155 is configured to perform one or more of the following functions: display the current state of the control device 2000, the measuring device 1000, or the system 100; receive inputs configured to set, modify, and / or adjust operating parameters of the control device 2000, the measuring device 1000, or the system 100; display measurement data of the control device 2000, the measuring device 1000, or the system 100 (e.g., in the form of individual data sets, data sets of one or more time series, and / or in real-time display).

[0116] Figure 5A cross-sectional view of a measurement device 1000 for measuring a fluid flow according to a first embodiment of the present specification is shown. The device 1000 according to the first embodiment includes a PCB 1400, a first ultrasonic transducer 1410, and a second ultrasonic transducer 1420. In the present specification, an ultrasonic transducer may also be referred to as a "ceramic" or a "piezoelectric ceramic". The first ultrasonic transducer 1410 and the second ultrasonic transducer 1420 are respectively connected to a first PCB 1416 and a second PCB 1426. The structures of the ultrasonic transducers 1410, 1420 and the PCBs 1416, 1426 will be described in more detail below. The first ultrasonic transducer 1410 and the first PCB 1416 form a first transducer module 1411. The second ultrasonic transducer 1420 and the second PCB 1428 form a second transducer module 1421.

[0117] Each of the first ultrasonic transducer 1410 and the second ultrasonic transducer 1420 may include or be composed of a piezoelectric ceramic material. Generally, the first ultrasonic transducer 1410 and the second ultrasonic transducer 1420 are electro / acoustic transducers. Preferably, the first ultrasonic transducer 1410 and the second ultrasonic transducer 1420 have conductive contact surfaces. In some embodiments, the first ultrasonic transducer 1410 and the second ultrasonic transducer 1420 include lead zirconate titanate ceramics. However, in other embodiments, the first ultrasonic transducer 1410 and the second ultrasonic transducer 1420 may be made of other (ceramic) materials or otherwise include other (ceramic) materials.

[0118] The PCB 1400 includes a first connector 1418 and a second connector 1428. The first connector 1418 is configured to receive the first transducer module 1411 and define the position and orientation of the first transducer module 1411 relative to the PCB 1400. The second connector 1418 is configured to receive the second transducer module 1421 and define the position and orientation of the second transducer module 1421 relative to the PCB 1400. The first connector 1418 and the second connector 1428 respectively position and orient the first and second ultrasonic transducer modules 1411, 1421 substantially perpendicular to the PCB 1400. In addition, the first and second ultrasonic transducer modules 1411, 1421 are positioned facing each other approximately. In some embodiments, and depending on the structure of the fluid conduit 1200 and the characteristics of the medium to be measured, the first and second ultrasonic transducer modules 1411, 1421 are positioned facing each other with an offset.

[0119] An acoustic coupling medium 1140 (such as a thermoplastic material, especially an epoxy resin) fills the gaps around the first and second ultrasonic transducers 1410, 1420 and between each respective ultrasonic transducer 1410, 1420 and the fluid conduit 1200. In Figure 5In the illustrated embodiment, the acoustic coupling medium 1140 has a first portion 1141 and a second portion 1142. In some embodiments, the first and second portions 1141, 1142 are connected to each other, for example, on a side of the PCB 1400 opposite to the side where the first and second ultrasonic transducers 1410, 1420 are located. The acoustic coupling medium 1140 includes a sound path 1160 (shown in dashed lines) that extends between the first and second ultrasonic transducers 1410, 1420 and passes through the measurement section 1230 of the fluid conduit 1200. As further described in this specification, the inner diameter of the measurement section 1230 and / or the fluid conduit 1200 substantially corresponds to the height of the first and second ultrasonic transducers 1410, 1420. In Figure 5 the illustrated embodiment, the sound path 1160 extends from the first ultrasonic transducer 1410, through the first portion 1141, through the measurement section 1230, through the second portion 1142, and to the second ultrasonic transducer 1420.

[0120] The PCB 1400 is positioned relative to the body 1100 of the measurement device 1000 such that the first and second ultrasonic transducer modules 1411, 1421 are positioned on respective opposite sides of the fluid conduit 1200. In addition, the first and second ultrasonic transducers 1410, 1420 are respectively positioned relative to the fluid conduit 1200 at a minimum distance D1 as Figure 5 shown, and such that the tops of the respective ultrasonic transducers 1410, 1420 are at the same level as the maximum distance h between the inner diameter of the fluid conduit 1200 and the surface of the PCB 1400, as Figure 5 shown. Additionally, the heights of the first and second ultrasonic transducers 1410, 1420 are selected to correspond to the inner diameter of the fluid conduit 1200. The distance between each ultrasonic transducer 1410, 1420 and the fluid conduit 1200 is crucial for the fluid flow measurement accuracy. Generally, the ultrasonic transducers 1410, 1420 can generate ultrasonic signals, such as ultrasonic waves. When ultrasonic waves propagate through a medium, the parts of the ultrasonic waves can be referred to as the near field and the far field. In the near field, the ultrasonic waves have characteristics corresponding to a point emitter that emits ultrasonic waves in all directions. After the ultrasonic waves propagate a certain distance, in the far field, the ultrasonic waves begin to have unique wavefront characteristics.

[0121] The far field is defined as follows:

[0122]

[0123] where

[0124] r far field min → the minimum distance to the far field

[0125] A Ceramic → the effective transmission area

[0126] c Sound channel →Sound velocity in the sound channel

[0127] f transmit →Input frequency of the ceramic

[0128] The ultrasonic properties of the acoustic coupling medium 1140 (such as epoxy resin including the sound path 1160) and the input frequency must be considered. It has been found that the preferred minimum distance D1 between the ultrasonic transducers 1410, 1420 and the fluid conduit 1200 is at least 50% of the following quantity:

[0129]

[0130] wherein,

[0131] T ceramic / fluid conduit →Average minimum distance between the ceramic and the fluid conduit

[0132] A ceramic →Effective emission area of the height and width of the ceramic surface

[0133] c sound channel →Sound velocity in the sound channel

[0134] f transmit →Input frequency of the ceramic

[0135] In the first embodiment, for example, for an effective emission area A ceramic of 3 mm × 6 mm, a sound velocity of 2900 m / s, and an input frequency f transmit of 4.8 MHz for the ultrasonic transducer, the minimum distance D1 can be determined as:

[0136]

[0137] Under the operating configuration of the measuring device 1000 and the control device 2000, the ECU 2200 sends a first control signal to the first ultrasonic transducer 1410. The first ultrasonic transducer 1410 is configured to emit an ultrasonic signal when receiving the first control signal from the ECU 2200. The first control signal is sent through the electrical connectors 2280 and 1480. The first ultrasonic transducer 1410 guides the emitted ultrasonic signal substantially along the sound path 1160 through the acoustic coupling medium 1140, towards the measuring section 1230 of the fluid conduit 1200, and further towards the second ultrasonic transducer 1420. The acoustic coupling medium 1140 is configured to include a substantially homogeneous thermoplastic material (such as epoxy resin) that has no impurities such as air bubbles or particles. The acoustic coupling medium 1140 is configured to conduct ultrasonic signals from the first and second ultrasonic transducers 1410, 1420 and the medium present in or flowing through the fluid conduit 1200, and to conduct ultrasonic signals to the first and second ultrasonic transducers 1410, 1420 and the medium present in or flowing through the fluid conduit 1200.

[0138] The second ultrasonic transducer 1420 receives the ultrasonic signal emitted by the first ultrasonic transducer 1410 and generates a measurement signal based on the received ultrasonic signal when the emitted ultrasonic signal impinges on the medium to be measured in the measuring section 1230. Generally, this is applied, for example, to Figure 5 the embodiment shown and Figure 6 the embodiment shown, the emitted ultrasonic signal is guided substantially along the sound path 1160, and thus substantially uniquely through the measuring section 1230 of the fluid conduit 1200. This is achieved in part by the transmitting ultrasonic transducer (such as the ultrasonic transducer 1410), which is configured to direct the ultrasonic signal towards the direction of the measuring section 1230 (for example, see Figure 5 , direct guidance, or see Figure 6 , indirect guidance). This is further achieved by the air backs 1120, 1130 defined by the fluid conduit 1200 and / or the body 1100. The air backs 1120, 1130 include air and are configured to reflect, attenuate or eliminate (at the boundary layer between the air back wall 1125 and the air contained in the air backs 1120, 1130) the ultrasonic signals entering either of the air backs 1120, 1130. The air back wall 1125 separates the air backs 1120, 1130 from the acoustic coupling medium 1140. The air backs 1120, 1130 are configured to attenuate or completely block the ultrasonic signals between the first and second ultrasonic transducers 1410, 1420 that do not travel along the sound channel 1160. This can improve the measurement resolution and / or accuracy of the measuring device 1000.

[0139] The air backing 1130 and the associated air backing wall 1125 are also configured to precisely position the PCB 1400 relative to the fluid conduit 1200. More precise positioning of the PCB 1400 relative to the fluid conduit 1200 enables more precise positioning of the first and second ultrasonic transducers 1410, 1420 relative to the fluid conduit 1200. This can improve the measurement resolution and / or accuracy of the measuring device 1000.

[0140] The sound path 1160 shows a path along which an ultrasonic signal, for example, transmitted by the first ultrasonic transducer 1410 and received by the second ultrasonic transducer 1420, travels in the direction of and through the measurement section 1230 of the fluid conduit 1200. As shown, the first and second ultrasonic transducers 1410, 1420 are configured to have a height that substantially corresponds to the fluid conduit 1200. In particular, the first and second ultrasonic transducers 1410, 1420 are configured to have a height that substantially corresponds to the inner diameter of the fluid conduit 1200. Additionally, the first and second ultrasonic transducers 1410, 1420 are configured to have a width such that the aspect ratio of the height to the width of the transducer is 3:2 or greater. By varying the width of the first and second ultrasonic transducers 1410, 1420, the sensitivity of the fluid flow measurement can be adjusted.

[0141] By guiding the transmitted ultrasonic signal substantially in the above manner and substantially uniquely through the measurement section 1230 of the fluid conduit 1200, the resolution and / or accuracy of the fluid flow measurement can be improved.

[0142] Figure 5A A perspective front view and a rear view of the transducer modules 1411, 1421 according to an embodiment of the present specification are shown. On Figure 5A the left side, the transducer module (e.g., 1411, 1421) is shown in a perspective front view. On Figure 5A the right side, the transducer module (e.g., 1411, 1421) is shown in a perspective rear view. The transducer module includes an ultrasonic transducer (e.g., 1410, 1420), a transducer PCB (e.g., 1416, 1426), and a pair of contacts (e.g., 1415, 1425). The pair of contacts is configured to electrically connect the transducer module to the corresponding connectors (e.g., 1418, 1428) of the PCB 1400. Each contact in the pair of contacts is also configured to be electrically connected to the corresponding electrode of the corresponding ultrasonic transducer to achieve an electrical connection between the corresponding electrode and the conductive path on the PCB 1400.

[0143] Figure 5BA perspective view of transducer modules 1411, 1421 positioned on a PCB 1400 according to an embodiment of the present specification is shown. A first connector 1418 is configured to receive the first transducer module 1411 and define the position and orientation of the first transducer module 1411 relative to the PCB 1400. A second connector 1418 is configured to receive the second transducer module 1421 and define the position and orientation of the second transducer module 1421 relative to the PCB 1400. The first connector 1418 and the second connector 1428 respectively position and orient the first and second ultrasonic transducer modules 1411, 1421 substantially perpendicular to the PCB 1400 (e.g., at a 90° angle relative to the plane in which the PCB 1400 lies). Additionally, the first and second connectors 1418, 1428 respectively position the first and second ultrasonic transducers vertically relative to the plane in which the PCB 1400 lies such that the tops of the respective first and second ultrasonic transducers 1410, 1420 are at the same distance h from the surface of the PCB 1400. This distance h is configured to correspond to the maximum distance h between the inner diameter of the fluid conduit 1200 and the surface of the PCB 1400, as Figure 5 shown.

[0144] Figure 5C A top view of connectors 1418, 1428 positioned on a PCB 1400 and configured to receive transducer modules 1411, 1421 according to an embodiment of the present specification is shown. The first and second transducer modules 1411 and 1421 are positioned generally facing each other. In some embodiments, and depending on the characteristics of the medium to be measured, the first and second ultrasonic transducer modules 1411, 1421 are positioned generally facing each other with an offset determined based on, for example, Snell-Descartes' law.

[0145] Figure 6 A cross-sectional view of a measurement device 1000 for measuring fluid flow according to a second embodiment of the present specification is shown. The device 1000 according to the second embodiment includes a PCB 1400, a first ultrasonic transducer 1410, and a second ultrasonic transducer 1420. The first ultrasonic transducer 1410 and the second ultrasonic transducer 1420 are directly connected to the PCB 1400.

[0146] Each of the first ultrasonic transducer 1410 and the second ultrasonic transducer 1420 may include or be composed of a piezoelectric ceramic material, as described above with respect to the first embodiment.

[0147] The PCB 1400 defines the positions of the first ultrasonic transducer 1410 and the second ultrasonic transducer 1420 relative to the acoustic coupling medium 1140, the reflective surface 1145, and the fluid conduit 1200. Additionally, the first and second ultrasonic transducers 1410, 1420 are generally positioned to face the corresponding reflective surface 1145 and, taking reflection into account, face the fluid conduit 1200. Generally, the reflection is defined by the boundary layer at the reflective surface 1145 and the air backing on the side of the reflective surface 1145 opposite the acoustic coupling medium 1140 and the first or second ultrasonic transducer 1410, 1420. As described above with respect to the air backs 1120, 1130, the air reflection at or behind the reflective surface 1145 (at the boundary layer between the air and the reflective surface 1145) is caused by the ultrasonic signal emitted by the first or second ultrasonic transducer 1410, 1420 such that substantially the entire ultrasonic signal is reflected along the direction of the measurement section 1230 and passes through the measurement section 1230.

[0148] The acoustic coupling medium 1140 fills the space around the first and second ultrasonic transducers 1410, 1420 and between each respective ultrasonic transducer 1410, 1420 and the fluid conduit 1200. In Figure 6 the illustrated embodiment, the acoustic coupling medium 1140 has a first portion 1141 and a second portion 1142. In some embodiments, the first and second portions 1141, 1142 are connected to each other, such as on the side of the PCB 1400 opposite the side where the first and second ultrasonic transducers 1410, 1420 are located. The acoustic coupling medium 1140 includes a sound path 1160 (shown in dashed lines) that extends between the first and second ultrasonic transducers 1410, 1420 and passes through the measurement section 1230 of the fluid conduit 1200. As further described in this specification, the measurement section 1230 and / or the inner diameter of the fluid conduit 1200 substantially corresponds to the height of the first and second ultrasonic transducers 1410, 1420 (where the height of the first and second ultrasonic transducers 1410, 1420 is measured along a plane parallel to the surface of the PCB 1400 on which the first and second ultrasonic transducers 1410, 1420 are mounted). In Figure 6 the illustrated embodiment, the sound path 1160 extends from the first ultrasonic transducer 1410 through the first portion 1141 to the reflective surface 1145, continues through the first portion 1141, the measurement section 1230, and the second portion 1142, reaches the reflective surface 1145, and continues through the second portion 1142 to the second ultrasonic transducer 1420. In Figure 6In the illustrated embodiment, the reflective surface 1145 reflects the sound path 1160 twice at an angle of substantially 90°. The reflective surface 1145 is respectively configured to be at an angle of approximately 45° with respect to the plane of the PCB 1400 and / or the plane of the first and second ultrasonic transducers 1410, 1420 mounted to the PCB 1400.

[0149] In some embodiments, and depending on the characteristics of the medium to be measured, the first and second ultrasonic transducers 1410, 1420 are positioned approximately facing each other with an offset determined based on, for example, Snell-Descartes' law.

[0150] The PCB 1400 is positioned relative to the body 1100 of the measuring device 1000 such that the first and second ultrasonic transducers 1410, 1420 are positioned on respective opposite sides of the fluid conduit 1200. In addition, the first and second ultrasonic transducers 1410, 1420 are respectively positioned at a minimum distance D1 with respect to the corresponding reflective surface 1145, as Figure 6 shown. The distance between each ultrasonic transducer 1410, 1420 and the corresponding reflective surface may be crucial for fluid flow measurement accuracy. Generally, the same principle of ultrasonic wave propagation also applies to the second embodiment described above with respect to the first embodiment.

[0151] For the second embodiment, Equation (2) is modified because the distance D1 defines the distance between each ultrasonic transducer and the corresponding reflective surface:

[0152]

[0153] where,

[0154] r ceramic / fluid conduit → Average minimum distance between the ceramic and the reflective surface

[0155] A ceramic → Effective emission area of the height and width of the ceramic surface

[0156] c sound channel → Speed of sound in the sound channel

[0157] f transmit → Input frequency of the ceramic

[0158] In the first embodiment, for example, for an effective emission area A ceramic of 3 mm × 6 mm, a sound speed of 2900 m / s, and an input frequency f transmit of 4.8 MHz for the ultrasonic transducer, the minimum distance D1 can be determined as:

[0159]

[0160]

[0161] In the operating configuration of the measuring device 1000 and the control device 2000, the ECU 2200 sends a first control signal to the first ultrasonic transducer 1410. The first ultrasonic transducer 1410 is configured to emit an ultrasonic signal when receiving the first control signal from the ECU 2200. The first control signal is sent through the electrical connectors 2280 and 1480. The first ultrasonic transducer 1410 guides the emitted ultrasonic signal substantially along the sound path 1160 through the acoustic coupling medium 1140, towards the measuring section 1230 of the fluid conduit 1200, and further towards the second ultrasonic transducer 1420.

[0162] The second ultrasonic transducer 1420 receives the ultrasonic signal emitted by the first ultrasonic transducer 1410, and when the emitted ultrasonic signal impinges on the medium to be measured in the measuring section 1230, generates a measurement signal based on the received ultrasonic signal. Similar to that described above with respect to Figure 5 the emitted ultrasonic signal is guided substantially along the sound path 1160, and thus substantially uniquely through the measuring section 1230 of the fluid conduit 1200. In Figure 6 the illustrated embodiment, the ultrasonic signal is reflected twice at the respective boundary layers formed at the reflecting surface 1145, forming an angle of approximately 45° with respect to the plane in which the ultrasonic transducer is located (e.g., Figure 6 the plane substantially parallel to the plane in which the PCB 1400 is located as illustrated).

[0163] This is achieved in part by the transmitting ultrasonic transducer (e.g., ultrasonic transducer 1410), which is configured to guide the ultrasonic signal at the first reflecting surface 1145 and, based on this reflection, further guide the ultrasonic signal along the direction of the measuring section 1230. The ultrasonic signal is also guided at the second reflecting surface 1145 and, based on this secondary reflection, further guided along the direction of the second ultrasonic transducer 1420, which is configured to receive the ultrasonic signal and generate a measurement signal based on the received ultrasonic signal. The measurement of the fluid flow through the fluid conduit 1200 is based on the characteristic difference between the emitted ultrasonic signal and the received ultrasonic signal, which is caused by the characteristics of the medium present in or flowing through the fluid conduit 1200.

[0164] As Figure 6The illustrated sound path 1160 shows the path of an ultrasonic signal, e.g., transmitted by a first ultrasonic transducer 1410 and received by a second ultrasonic transducer 1420, propagating through the measurement section 1230 in the direction of the first reflection surface 1145, in the direction of the second reflection surface 1145, and continuing to propagate in the direction of the second ultrasonic transducer 1420. As shown, the first and second ultrasonic transducers 1410, 1420 are configured to have a height that substantially corresponds to the fluid conduit 1200. In particular, the first and second ultrasonic transducers 1410, 1420 are configured to have a height that substantially corresponds to the inner diameter of the fluid conduit 1200. Additionally, the first and second ultrasonic transducers 1410, 1420 are configured to have a width such that the aspect ratio of the height to the width of the transducer is 3:2 or greater. By varying the width of the first and second ultrasonic transducers 1410, 1420, the sensitivity of the fluid flow measurement can be adjusted.

[0165] By guiding the transmitted ultrasonic signal substantially in the above manner and substantially uniquely through the measurement section 1230 of the fluid conduit 1200, the resolution and / or accuracy of the fluid flow measurement can be improved.

[0166] Figure 7 A cross-sectional view of a measurement device 1000 and a control device 2000 for measuring fluid flow according to a first embodiment of the present specification is shown, in which a second variant 1480', 2280' of the electrical connection is shown. As described in the present specification, according to the first variant 1480, 2280 of the electrical connection, when the measurement device 1000 is coupled to the control device 2000, the electrical connectors 1480 and 2280 are mechanically connected to achieve the electrical connection 1480, 2280. According to the second variant of the electrical connection, an inductive electrical connection 1480', 2280' is formed based on an inductive connection between ultrasonic transducers (e.g., transducers 1410, 1420 or modules 1411, 1421) of the measurement device 1000 and the control device 2000 (e.g., ECU 2200). This can reduce or prevent connection problems (e.g., mechanical, electrical, wear, and / or tear problems) of the electrical connectors 1480, 2280 (e.g., plug and socket, male and female connectors).

[0167] An inductive electrical connection 1480', 2280' can be established using the electrical connector 1480' of the measurement device 1000 and the electrical connector 2280' of the control device 2000, e.g., as Figure 7 shown. The electrical connector 1480' of the measurement device 1000 includes a first coil 1481' and a second coil 1482', and optionally includes a third coil 1483'. The first coil 1481', the second coil 1482', and optionally the third coil 1483' are connected to the PCB 1400 of the measurement device 1000. The following reference is made toFigure 11 Describe the configuration using the respective third coils 1483' and 2283'. The respective electrical connections between the components connected to the PCB 1400 are implemented as conductive paths defined by the PCB 1400. The electrical connector 2280' of the control device 2000 includes a first coil 2281' and a second coil 2282', and optionally includes a third coil 2283'. The first ultrasonic transducer 1410 (or module 1411) is electrically connected to the first coil 1481' of the measuring device 1000, and the second ultrasonic transducer 1420 (or module 1421) is electrically connected to the second coil 1482' of the measuring device 1000. The first coil 2281' of the control device 2000 and the second coil 2282' of the control device 2000 are electrically connected to the ECU 2200 ( Figure 7 not shown in).

[0168] The first and second ultrasonic transducers 1410, 1420 are configured to operate based on a sinusoidal AC voltage. For example, an ultrasonic transducer (e.g., one of the ultrasonic transducers 1410, 1420) can be configured to emit an ultrasonic signal (e.g., in the form of a sinusoidal AC voltage) in response to receiving an (input) control signal. The control signal can be adapted to achieve the desired ultrasonic signal emitted from the ultrasonic transducer. In addition, an ultrasonic transducer (e.g., the one that does not emit an ultrasonic signal among the ultrasonic transducers 1410, 1420) can be configured to generate (output) a measurement signal (e.g., in the form of a sinusoidal AC voltage) in response to receiving an ultrasonic signal (e.g., an ultrasonic signal emitted from another ultrasonic transducer).

[0169] In some embodiments, the inductive connections (e.g., 1480', 2280'; 1480", 2280") are configured not to extend the phase of the emitted and received (original) ultrasonic signals. In addition, the attenuation of the inductive electrical connection should not exceed 10 dB.

[0170] The first coil 1481' of the measuring device 1000 is arranged relative to the coupling portion 1300 of the measuring device 1000, and the first coil 2281' of the control device 2000 is arranged relative to the coupling portion 2300 of the control device 2000 such that when the measuring device 1000 is coupled to the control device 2000, the first coils 1481' and 2281' are close to each other. The second coil 1482' of the measuring device 1000 is arranged relative to the coupling portion 1300 of the measuring device 1000, and the second coil 2282' of the control device 2000 is arranged relative to the coupling portion 2300 of the control device 2000 such that when the measuring device 1000 is coupled to the control device 2000, the second coils 1482' and 2282' are close to each other.

[0171] In some embodiments, the diameters of the first and second coils 1481', 2281', 1482', 2282' of the measuring device 1000 and the control device 2000 are 3 mm to 10 mm, preferably 3 mm, and they are arranged at a respective distance of 3 mm to 10 mm, preferably 3 mm, from each other (e.g., the pair of coils 1481' and 2281' and the coils 1482' and 2282').

[0172] In some embodiments, the distance between the two coils in each respective pair of coils (e.g., Figure 7 , Figure 8 the coils 1481', 2281' in Figure 9 , Figure 11 the coils 1482', 2280'; and optionally, the coils 1483', 2283'; also see

[0173] Figure 8 FIG. shows a circuit schematic of the electrical connections 1480', 2280' of the measuring device 1000 and the control device 2000 for measuring fluid flow according to a first embodiment of the present specification. The inductive electrical connections 1480', 2280' are established using the electrical connector 1480' of the measuring device 1000 and the electrical connector 2280' of the control device 2000. Although Figure 8 the devices 1000, 2000 are not shown in Figure 8 FIG., it should be understood that the measuring device 1000 includes the electrical connector 1480', and the control device 2000 includes the electrical connector 2280'. Generally, as an example configuration, Figure 8 the transmitting circuits 2001', 1001' are shown on the left side of the figure, and the receiving circuits 1002', 2002' are shown on the right side of the figure.

[0174] The electrical connector 1480' of the measuring device 1000 includes a first coil 1481' and a second coil 1482'. An optional third coil 1483' is not shown in Figure 8 The electrical connector 2280' of the control device 2000 includes a first coil 2281' and a second coil 2282'. An optional third coil 2283' is not shown in Figure 8 The first ultrasonic transducer 1410 (or transducer module 1411) is electrically connected to the first coil 1481' of the measuring device 1000, and the second ultrasonic transducer 1420 (or module 1421) is electrically connected to the second coil 1482' of the measuring device 1000. The first coil 2281' of the control device 2000 and the second coil 2282' of the control device 2000 are electrically connected to the ECU 2200 ( Figure 8 not shown in). The circuit implemented by the ECU 2200 of the control device 2000 further includes an input 2251' and an amplifier 2241' for a signal transmitting transducer (such as the ultrasonic transducer 1410 or transducer module 1411). The amplifier 2241' is configured to amplify the input signal transmitted to the coil 2281'. The circuit implemented by the ECU 2200 of the control device 2000 further includes an output 2252' and an amplifier 2242' for a signal generating transducer (such as the ultrasonic transducer 1420 or transducer module 1421). The amplifier 2242' is configured to amplify the output signal transmitted from the coil 2282'.

[0175] Figure 9 A cross-sectional view of the measuring device 1000 and the control device 2000 for measuring fluid flow according to the first embodiment of the present specification is shown, in which a third variant 1480", 2280" of the electrical connection is shown. According to the third variant of the electrical connection, an inductive electrical connection 1480", 2280" is formed based on the inductive connection between the ultrasonic transducers (such as transducers 1410, 1420 or modules 1411, 1421) of the measuring device 1000 and the control device 2000 (such as the ECU 2200). This can reduce or prevent connection problems (such as mechanical, electrical, wear and / or tear problems) of the electrical connectors 1480, 2280 (such as plugs and sockets, male and female connectors).

[0176] An inductive electrical connection 1480", 2280" is established using the electrical connector 1480" of the measuring device 1000 and the electrical connector 2280" of the control device 2000. For example, as Figure 9As shown. The electrical connector 1480" of the measuring device 1000 includes a first coil 1481" and a second coil 1482", and optionally includes a third coil 1483". The first coil 1481", the second coil 1482", and optionally the third coil 1483" are connected to the coupling portion 1300 and / or the main body 1100 of the measuring device 1000. The following is a reference to Figure 11 Describe the configuration using the corresponding third coils 1483" and 2283".

[0177] According to the third variant 1480", 2280" of the electrical connection, a PCB 1400 is not required to implement the electrical connection between components. The first coil 1481" and the first ultrasonic transducer 1410 are electrically connected to each other through the first PCB 1416" to form the first transducer module 1411", and the first transducer module 1411" includes the first ultrasonic transducer 1410, the first PCB 1416", and the first coil 1481". The second coil 1482" and the second ultrasonic transducer 1420 are electrically connected to each other through the second PCB 1426" to form the second transducer module 1421", and the second transducer module 1421" includes the second ultrasonic transducer 1420, the second PCB 1416", and the second coil 1482". The corresponding electrical connections between the components of the first and second PCBs 1416", 1426" are respectively implemented as conductive paths defined by the corresponding PCBs. The electrical connector 2280" of the control device 2000 includes a first coil 2281" and a second coil 2282", and optionally includes a third coil 2283".

[0178] The first and second ultrasonic transducers 1410, 1420 are configured to operate based on a sinusoidal AC voltage, as described in the text regarding Figure 7 As described. The operation mode of the electrical connection 1480", 2280" according to the third variant is the same as that described for the second variant above, and unless otherwise specifically stated, it is also the same as that described for the first variant.

[0179] The first coil 1481" of the measuring device 1000 is arranged relative to the coupling part 1300 of the measuring device 1000, and the first coil 2281" of the control device 2000 is arranged relative to the coupling part 2300 of the control device 2000 such that when the measuring device 1000 is coupled to the control device 2000, the first coils 1481" and 2281" are close to each other. The second coil 1482" of the measuring device 1000 is arranged relative to the coupling part 1300 of the measuring device 1000, and the second coil 2282" of the control device 2000 is arranged relative to the coupling part 2300 of the control device 2000 such that when the measuring device 1000 is coupled to the control device 2000, the second coils 1482" and 2282" are close to each other. In some embodiments, the first and second coils 1481", 2281", 1482", 2282" of the measuring device 1000 and the control device 2000 have a diameter of 3 mm to 10 mm, preferably 5 mm, and are arranged at a respective distance of 2 mm to 10 mm, preferably 5 mm, from each other (e.g., the pair of coils 1481" and 2281" and the coils 1482" and 2282").

[0180] In some embodiments, the measuring device 1000 is provided with an electrical connection (e.g., 1480, 2280; 1480', 2280'; 1480", 2280") according to any one of the first, second, and third variants described in this specification. In some embodiments, the control device 2000 is configured to support any one electrical connection (e.g., 1480, 2280; 1480', 2280'; 1480", 2280") according to the first, second, and third variants described in this specification, or a combination of two or more electrical connections (e.g., 1480, 2280; 1480', 2280'; 1480", 2280").

[0181] Figure 10 A circuit schematic diagram of a circuit for detecting the circuit of the measuring device 1000 according to an embodiment of this specification is shown. Generally, the control device 2000 is configured to detect the presence of the measuring device 1000 when the measuring device 1000 is coupled to the control device 2000. Additionally or alternatively, the control device 2000 may be configured to detect the configuration or type of the measuring device 1000 when the measuring device 1000 is coupled to the control device 2000. This can be implemented based on a circuit, for example, as Figure 10 or Figure 11 shown.

[0182] Figure 10 A circuit implemented by the ECU 2200 of the control device 2000 and the PCB 1400 of the measuring device 1000 is shown. The circuit is configured to use the electrical connections 1480, 2280 according to the first variant and based on the resistor 1484 ("RSensor ”) to detect the presence, configuration, and / or type of the measuring device. The circuit can be configured to implement resistance detection based on a “Wheatstone bridge”. In one embodiment, the resistors R1, R2, R3 are constant, while the resistor 1484 (R sensor ) is variable. Each variant of the measuring device 1000, i.e., a measuring device having different characteristics (e.g., a fluid conduit 1200 having a different diameter), can be configured using a corresponding resistor 1484 (R sensor ) with a selected or predetermined resistance value. The predetermined resistance can be between 1 kΩ and 200 kΩ, and / or can be set such that the generated measurement voltage resulting from different resistances can be reliably determined. The voltage U variable :

[0183]

[0184] The voltage U sensor is set according to the resistance value of the resistor 1484 (R variable ). Using this circuit, the corresponding variant of the measuring device 1000 can be determined. This can allow the control device 2000 to adjust the operating parameters of the corresponding measuring device 1000 coupled to the control device 2000 by selecting the corresponding configuration and / or setting the corresponding operating parameters. Figure 10 The circuit shown is configured to operate using a DC voltage.

[0185] Figure 11 A circuit schematic of a circuit for detecting the measuring device 1000 according to an embodiment of the present specification is shown. Figure 11 The circuit shown in is configured to detect the presence, configuration, and / or type of the measuring device using an inductive electrical connection (1480', 2280' or 1480", 2280") according to the second or third variant described in the present specification. Figure 11 The operating principle based on the second variant 1480', 2280' is shown. However, the third variant 1480", 2280" of the electrical connection can also be used to implement this circuit as described in the present specification. What is described in the following paragraphs regarding the third coils 1483' and 2283' is understood to apply to the first and second coils 1483", 2283" of the third variant 1480", 2280" of the electrical connection as described in the present specification.

[0186] This detection is based on the resistor 1484' (“R5”). The circuit can also be configured to implement resistance detection based on a “Wheatstone bridge”, as described above regarding Figure 10As described. Resistors R2 2284' and R5 1484' are respectively part of the electrical oscillation circuit. The oscillation circuit on the control device 2000 side with coil L2, resistor R2 2284', and capacitor C2 is constant. The oscillation circuit on the measuring device 1000 side (see coil L5, resistor R5 1484', and capacitor C5) is variable. Coils L4 2283' and L5 1483' are single coils, but when the measuring device 1000 is coupled to the control device 2000, these two coils are arranged close to each other to form a transformer. When the connected load changes due to the oscillation circuit existing when the measuring device 1000 is coupled to the control device 2000, voltage U variable 2285' also changes. This can be detected by the ECU 2200 of the control device 2000, and it can allow the control device 2000 to adjust the operating parameters of the corresponding measuring device 1000 coupled to the control device 2000 by selecting the corresponding configuration and / or setting the corresponding operating parameters. Figure 11 The circuit shown is configured to operate using an AC voltage.

[0187] Figure 12A The bottom view of the measuring device 1000 for measuring fluid flow according to an embodiment of the present specification is shown. As Figure 12A shown, the measuring device 1000 is provided with inductive electrical connections 1480', 2280' (or alternatively, inductive electrical connections 1480", 2280"). The PCB 1400 includes corresponding first and second ultrasonic transducers 1410, 1420 ( Figure 12A not shown in the figure), and corresponding associated coils 1481', 1482'. In some embodiments, coils 1481', 1482' are arranged on the first side of the PCB 1400 (for example, when the measuring device 1000 is coupled to the control device 2000, the first side of the PCB 1400 facing the coupling portion 2300 of the control device 2000), and the first transducer 1410 and the second transducer 1420 are arranged on the second side of the PCB 1400 opposite to the first side. As Figure 12A shown, coils 1481' and 1482' (and optionally, coil 1483') are respectively positioned at intervals from each other such that the induced signals do not interfere with adjacent coils and / or pairs of coils (such as coils 1481', 2281'; coils 1482', 2280'; and optionally, Figure 7 、 Figure 8 coils 1483', 2283' in Figure 9 、 Figure 11 ; also see coils 1481", 2281"; coils 1482", 2280"; and optionally,

[0188] Figure 12B A perspective view of a control device 2000 for measuring a fluid flow in accordance with an embodiment of the present specification is shown. As Figure 12B shown, the control device 2000 is provided with inductive electrical connections 1480', 2280' (or alternatively, inductive electrical connections 1480", 2280"). The coupling portion 2300 of the control device 2000 includes corresponding coils 2281', 2282'. In some embodiments, when the measuring device 1000 is coupled to the control device 2000, the coils 2281', 2282' are generally arranged on the mounting surface 2310 and face the coupling portion 1300 of the measuring device 1000. However, the coils 2281', 2282' can be arranged at multiple positions on or within the coupling portion 2300 of the control device 2000 as long as the corresponding coils can be placed near the corresponding coils of the measuring device 1000. As Figure 12B shown, the coils 2281' and 2282' (and optionally, the coil 2283') are positioned at intervals from each other such that the inductive signals do not interfere with adjacent coils and / or pairs of coils (e.g., coils 1481', 2281'; coils 1482', 2280'; and optionally, Figure 7 , Figure 8 the coils 1483', 2283' in Figure 9 , Figure 11 ; also see coils 1481", 2281"; coils 1482", 2280"; and optionally, Figure 9 , Figure 11 the coils 1483", 2283" in

[0189] In some embodiments, the control device 2000 and / or the coupling portion 2300 are at least partially composed of stainless steel components. These components can prevent or interfere with the inductive electrical connections described in the present specification. In such embodiments, when the control device 2000 implements any of the inductive electrical connections 2280' or 2280", the corresponding portions of the coupling portion 2300 and / or the mounting surface 2310 made of stainless steel can be configured to include portions made of a material that does not block or interfere with the inductive coupling as described in the present specification. In some embodiments, the material can include a thermoplastic material, such as epoxy resin.

[0190] Some embodiments of system 100 may implement a hybrid construction of components from first, second, and third variants of electrical connections (e.g., 1480, 2280; 1480', 2280'; 1480", 2280"). For example, the control device 2000 of system 100 may be configured to provide an electrical connection 2280 (e.g., based on a male / female or plug / socket type electrical connector as described in this specification) and an inductive electrical connection 2280' or 2280" (e.g., based on inductive coupling of corresponding pairs of coils as described in this specification). Such a "hybrid" control device 2000 is configured to receive a measurement device 1000 that implements an electrical connection 1480 (e.g., based on a male / female or plug / socket type electrical connector as described in this specification) or an inductive electrical connection 1480' or 1480" (e.g., based on inductive coupling of corresponding pairs of coils as described in this specification).

[0191] Figure 13 A process diagram for determining the ultrasonic transducer pairs used is shown in accordance with an embodiment of this specification. The first and second ultrasonic transducers 1410, 1420 used as a pair of transducers in the measurement device 1000 are selected to have characteristics that are aligned or matched with each other. This can significantly improve the resolution and / or accuracy of the measurements performed using the measurement device 1000. The characteristics of the transducers (e.g., ceramics) are determined based on magnitude and angle (or phase), as shown in the diagram of Figure 13 Based on the phase diagram, the maximum angle is detected (see the bottom diagram of Figure 13 ) and the corresponding frequency is determined. The determined frequency (i.e., the "input frequency") represents the optimal operating frequency of the transducer. In the magnitude diagram (see the top diagram in Figure 13 ), the transducer magnitudes at the anti-resonant frequency, resonant frequency, and input frequency are determined. For the paired selection of transducers, the determined characteristics are evaluated and the transducers are classified accordingly. Subsequently, transducers with the same acoustic characteristics are selected for manufacturing the measurement device 1000.

[0192] Figure 14 is a flowchart of an example manufacturing process 1500 of the measurement device 1000 in accordance with an embodiment of this specification. The process of epoxy resin processing is usually very complex because environmental impacts may cause the material properties to be affected. For process 1500, several aspects are considered, especially in casting.

[0193] In some embodiments, the epoxy resin for casting comprises a two-component epoxy resin including a resin and a hardener. During the mixing process of the epoxy resin, a specific mixing ratio must be observed according to the manufacturing instructions of the corresponding materials used. Even a minor change in the mixing ratio can lead to undesirable changes in the material properties of the epoxy resin and thus to changes in the ultrasonic properties of the epoxy resin forming the acoustic coupling medium 1140. For this reason, the epoxy resin is mixed in a mixing / casting device and under defined processes and process conditions. The surface of the object to be cast must be free of grease and oil. The adhesion of the epoxy resin to high-temperature plastics such as PPSU, PSU, and PES may also be problematic because the surface tension of such materials is generally relatively low. Therefore, it is recommended to use, for example, a cold plasma process to activate the plastic surface. The epoxy resin preferably has a low viscosity so that the acoustic path 1160 can be cast as bubble-free as possible. If the epoxy resin is highly viscous, air reservoirs can (and most likely will) form in the acoustic path 1160. This can lead to undesirable and / or uncontrolled deflection of the ultrasonic signal. Even when using a low-viscosity epoxy resin, air reservoirs can form in the acoustic coupling medium 1140 and / or in the acoustic path 1160. For this reason, it is highly desirable that all entrapped air can escape from the acoustic coupling medium 1140 and / or the acoustic path 1160. Constructively, this can be achieved by openings and / or slots in the PCB 1400. Especially on metal surfaces, such as on ceramics (e.g., ultrasonic transducers 1410, 1420), very small bubbles (e.g., with a diameter of less than 1 mm) can form. Such bubbles, like the bubbles in the air backing, can lead to undesirable and / or uncontrolled deflection of the ultrasonic signal and should therefore be avoided as much as possible. After casting, the pressure is increased again to atmospheric pressure. Then curing is carried out at a constant temperature.

[0194] Process 1500 begins at step 1502. If process 1500 includes optional step 1504, the process continues to step 1504, otherwise it continues to step 1506.

[0195] In optional step 1504, the first and second ultrasonic transducers 1410, 1420 or the first and second transducer modules 1411, 1421 are arranged relative to the PBC 1400. In step 1504, according to an embodiment (e.g., one of the first and second embodiments described in this specification), the first and second transducer modules 1411, 1421 are arranged (e.g., inserted into connectors 1418, 1428; see Figure 5 , Figure 5B ), or the first and second ultrasonic transducers 1410, 1420 are electrically and mechanically connected to the PCB 1400 (e.g., as shown in Figure 6 ). According to the corresponding embodiment (e.g., with or without a reflective surface 1145; seeFigure 5 , Figure 6 ), the body 1100 is configured with different recesses that form a casting cavity for the acoustic coupling medium 1140.

[0196] In step 1506, the inner surface of the body 1100 is prepared by activating the surface of the plastic surrounding the acoustic coupling medium 1140, such as using a cold plasma process. Step 1506 may additionally include inspecting the inner surface of the body 1100, which defines a casting cavity for the acoustic coupling medium 1140 and / or a sound path 1160 for contaminants such as oil and grease, and / or other object removal or cleaning steps.

[0197] In step 1508, the PCB 1400 is positioned relative to the body 1100. The body 1100 is provided with structural features (such as one or more grooves, notches, rods, pins, supports) to allow for the precise positioning of the PCB 1400 and thus allow for the precise positioning of the ultrasonic transducers 1410, 1420 relative to the fluid conduit 1200.

[0198] In step 1510, casting is performed. To reduce the number and / or presence of air bubbles or to completely prevent their formation, the casting process is performed under vacuum. During curing, the epoxy resin shrinks by up to 15%. Therefore, the encapsulated volume covered by the acoustic coupling medium 1140 is at least 30% larger than the encapsulated volume of the sound path 1160 to ensure a reduced or eliminated possibility of forming air bubbles or reservoirs in the sound path 1160. In some embodiments, the PCB 1400 is provided with one or more openings that allow the epoxy resin to flow into the casting cavity when the epoxy resin shrinks during casting and / or curing. This can reduce or completely prevent mechanical deformation of the PCB 1400 and / or other components caused by the shrinkage of the epoxy resin. Mechanical deformation may negatively affect the resolution and / or accuracy of the measurements subsequently performed using the measuring device 1000.

[0199] In step 1512, curing is performed under controlled conditions defined by the respective profiles of, for example, temperature and relative humidity. The process 1500 ends at step 1520.

[0200] Figure 15 A cross-sectional view of a measuring device 1000 for measuring fluid flow according to a first embodiment of the present specification is shown. In some embodiments, the PCB 1400 is provided with an opening 1490. When performing the casting and curing of the epoxy resin, as described in the present specification, the resin tends to shrink. The opening 1490 allows the resin to further flow into the cavity such that substantially the entire cavity can be occupied by the resin (see, for example, Figure 5the first and second portions 1141, 1142 of the acoustic coupling medium 1140 as shown). The opening 1490 is located at a distance D2 which is substantially half of the distance D1, that is to say, substantially half of the distance between the respective ultrasonic transducers 1410, 1420 and the measurement section 1230 of the fluid conduit 1200:

[0201] Positioning the opening 1490 at a distance D2 (i.e.) which is substantially half of the distance between the respective ultrasonic transducers 1410, 1420 and the measurement section 1230 of the fluid conduit 1200 can allow resin to flow in evenly and without restriction during casting and / or curing, such that the precise positioning and / or orientation of the ultrasonic transducers 1410, 1420 is not negatively affected by forces such as those exerted by the shrinkage of the epoxy resin during casting and / or curing.

[0202] To provide interaction with a user, the subject matter described in this specification may be implemented on one or more computers (such as the ECU 2100), the computer having the following components or being configured to communicate with the following components: a display device (such as Figure 4B 2150 as shown), such as a liquid crystal display (LCD) monitor, for displaying information to the user; and an input device through which the user can provide input to the computer, such as a touch display 2150, a keyboard, and an indicating device, such as a mouse, a trackball, or a touchpad, which are configured to provide a user interface 2155 (see for example Figure 4B ). Other types of devices may also be used to provide interaction with the user; for example, the feedback and response provided to the user may be any form of sensory feedback, such as visual, auditory, speech, or tactile; and the input from the user may be received in any form, including sound, speech, or tactile input, including touch actions or gestures, or motion actions or gestures, or orientation actions or gestures.

[0203] This specification uses the term "configured to" in connection with systems, devices, and computer program components. A system of one or more computers being configured to perform a particular operation or action means that software, firmware, hardware, or a combination thereof has been installed on the system that causes the system to perform the operation or action in operation. One or more computer programs being configured to perform a particular operation or action means that the one or more programs include instructions that, when executed by a data processing device, cause the device to perform the operation or action. Proprietary logic circuitry being configured to perform a particular operation or action means that the circuitry has electronic logic for performing the operation or action.

[0204] Although this specification contains many specific implementation details, these details should not be construed as limiting the scope of protection defined by the claims themselves, but rather as descriptions of features that may be specific to particular embodiments of a particular invention. In this specification, certain features described in the context of separate embodiments may also be implemented in combination in a single embodiment. Conversely, the various features described in the context of a single embodiment may also be implemented separately or in any suitable sub-combination in multiple embodiments. Additionally, although features may have been described above as acting in certain combinations and even initially claimed as such, one or more features from the claimed combination may in some cases be excluded from the combination, and the claims may be directed to a sub-combination or a variation of the sub-combination.

[0205] Similarly, although operations are depicted in the drawings in a particular order and recited in the claims in a particular order, this should not be understood as requiring that the operations be performed in the particular order shown or in a sequential order, or that all of the operations shown be performed to achieve the desired result. In some cases, multitasking and parallel processing may be advantageous. Additionally, the separation of the various system modules and components in the above embodiments should not be understood as required in all embodiments, and it should be understood that the described program components and systems may generally be integrated together in a single software product or packaged in multiple software products.

[0206] Specific embodiments of the subject matter have been described. Other embodiments also fall within the scope of the appended claims. For example, the operations recited in the claims may be performed in a different order and still achieve the desired result. As an example, the processes described in the drawings do not necessarily require the particular order or sequential order shown to achieve the desired result. In some cases, multitasking and parallel processing may be advantageous.

Claims

1. A measuring device (1000), the measuring device being configured to be coupled to a control device (2000), the measuring device comprising: A fluid conduit (1200); A first electrical connector (1480, 1480', 1480"); A first ultrasonic transducer (1410) and a second ultrasonic transducer (1420), electrically connected to the first electrical connector respectively; and An acoustic coupling medium (1140), the acoustic coupling medium coupling the first ultrasonic transducer (1410) and the second ultrasonic transducer (1420) to the fluid conduit, wherein, The first ultrasonic transducer is configured to, in response to receiving a control signal, emit an ultrasonic signal along a sound path (1160), the sound path extending from the first ultrasonic transducer through the acoustic coupling medium to the second ultrasonic transducer, and The second ultrasonic transducer is configured to receive the ultrasonic signal transmitted along the sound path and generate a measurement signal based on the received ultrasonic signal, wherein the fluid conduit is at least partially disposed along the sound path such that the emitted ultrasonic signal propagates along the sound path and impinges on a medium to be measured in a measurement section (1230) of the fluid conduit.

2. The measuring device (1000) according to claim 1, wherein, The acoustic coupling medium (1140) comprises a first portion (1141) and a second portion (1142), wherein the first portion couples the first ultrasonic transducer (1410) to the fluid conduit (1200), and the second portion couples the second ultrasonic transducer (1420) to the fluid conduit.

3. The measuring device (1000) according to claim 2, further comprising an air backing (1120, 1130), the air backing being positioned adjacent to the fluid conduit (1200) and separating the first portion (1141) of the acoustic coupling medium (1140) from the second portion of the acoustic coupling medium.

4. The measuring device (1000) according to claim 3, wherein, The air backing (1120, 1130) is configured to acoustically decouple the first portion (1141) of the acoustic coupling medium (1140) from the second portion of the acoustic coupling medium such that an ultrasonic signal propagating along the sound path (1160) does not directly propagate from the first portion (1141) into the second portion (1142).

5. The measuring device (1000) according to any one of claims 2 to 4, wherein, The sound path (1160) extends from the first ultrasonic transducer (1410) through the first portion (1141) of the acoustic coupling medium (1140), through the measurement section (1230), and through the second portion of the acoustic coupling medium, to the second ultrasonic transducer (1420).

6. The measuring device (1000) according to any one of the preceding claims, wherein, The acoustic coupling medium (1140) comprises a thermoplastic material, preferably, wherein the thermoplastic material comprises epoxy resin and / or is substantially homogeneous.

7. The measuring device (1000) according to any one of the preceding claims further includes a printed circuit board PCB (1400), the PCB including the first electrical connector (1480, 1480'), and being configured to electrically connect the first ultrasonic transducer (1410) and the second ultrasonic transducer (1420) to the first electrical connector.

8. The measuring device (1000) according to claim 7, wherein, Each of the first ultrasonic transducer (1410) and the second ultrasonic transducer (1420) is mechanically connected to the PCB (1400).

9. The measuring device (1000) according to claim 7, wherein, The first ultrasonic transducer (1410) and the first connection portion (1416) of the first ultrasonic transducer form a first transducer module (1411), and the second ultrasonic transducer (1420) and the second connection portion (1426) of the second ultrasonic transducer form a second transducer module (1421).

10. The measuring device (1000) according to claim 9, wherein, The first connection portion (1418) and the second connection portion (1428) of the PCB (1400) are configured to electrically and mechanically connect the first ultrasonic transducer (1410) and the second ultrasonic transducer (1420) to the PCB.

11. The measuring device (1000) according to any one of claims 9 or 10, wherein, The first connection portion (1418) and the second connection portion (1428) of the PCB (1400) are configured to electrically and mechanically connect the first ultrasonic transducer (1410) and the second ultrasonic transducer (1420) to the PCB (1400).

12. The measuring device (1000) according to any one of claims 7 to 11, wherein, The first electrical connector (1480) includes one or more of a USB-C connector, a USB-A connector, a USB-B connector, a micro USB connector, a mini USB connector, an HDMI connector, and a SUB-D connector.

13. The measuring device (1000) according to any one of claims 1 to 11, wherein, The first electrical connectors (1480', 1480") include a first coil (1481') and a second coil (1482').

14. The measuring device (1000) according to the previous claim, wherein, The first coil (1481') is configured to be inductively coupled to the first coil (2281') of the control device (2000), and the second coil (1482') is configured to be inductively coupled to the second coil (2282') of the control device (2000).

15. The measuring device (1000) according to the previous claim, wherein, The first electrical connectors (1480', 1480") include a third coil (1483'), and the third coil is configured to be inductively coupled to the third coil (2281') of the control device (2000).

16. The measuring device (1000) according to any one of the preceding claims in combination with claims 7 and 13, wherein, The PCB (1400) includes the first coil (1481') and the second coil (1482') of the first electrical connector (1480'), and optionally the third coil (1483') of the first electrical connector (1480').

17. The measuring device (1000) according to any one of the preceding claims, wherein, The first electrical connectors (1480, 1480', 1480") are configured to distribute electrical signals, optionally, wherein the electrical signals include control signals and measurement signals.

18. The measuring device (1000) according to any one of the preceding claims, wherein, The first electrical connectors (1480, 1480', 1480") are configured to be connected to the second electrical connectors (2280, 2280', 2280") of the control device (2000).

19. The measuring device (1000) according to any one of the preceding claims, wherein, The first ultrasonic transducer (1410) is configured to receive control signals from the control device (2000) via the first electrical connector (1480', 1480', 1480"), and / or wherein the second ultrasonic transducer (1420) is configured to send the measurement signals to the control device via the first electrical connector (1480', 1480', 1480").

20. The measuring device (1000) according to any one of the preceding claims, further comprising one or more sensors, wherein the one or more sensors comprise one or more of the following: a temperature sensor, a pressure sensor, a conductivity sensor, and an optical sensor.

21. The measuring device (1000) according to any one of the preceding claims, wherein, the inner diameter of the fluid conduit (1200) is in the range of 0.1 inches to 0.5 inches (0.254 cm to 1.27 cm), preferably, wherein the inner diameter is 0.25 inches (0.635 cm); or the inner diameter of the fluid conduit is in the range of 0.5 inches to 1.5 inches (1.27 cm to 3.81 cm), preferably, wherein the inner diameter is 1 inch (2.54 cm).

22. The measuring device (1000) according to any one of the preceding claims, wherein, The fluid conduit (1200) has a first end (1210) and a second end (1220), the first end and the second end being in fluid communication with each other and being configured to be attached to a fluid circuit.

23. The measuring device (1000) according to the previous claim, wherein, The first end (1210) and / or the second end (1220) includes one of the following: a sanitary connector, a sterile quick connector, and an MPX plug-in.

24. The measuring device (1000) according to any one of the preceding claims, further comprising a body (1100).

25. The measuring device (1000) according to claim 24, wherein, The body (1100) includes a coupling portion (1300), the coupling portion being configured to couple the measuring device to the control device (2000).

26. The measuring device (1000) according to any one of claims 24 or 25, wherein, The body (1100) defines the fluid conduit (1200) as a component of the body.

27. The measuring device (1000) according to any one of claims 24 to 26, wherein, The body (1100) is configured to fixedly position the PCB (1400) relative to the fluid conduit (1200).

28. The measuring device (1000) according to any one of the preceding claims, wherein, The first ultrasonic transducer (1410) and the second ultrasonic transducer (1420) are fixedly positioned relative to the fluid conduit (1200) via the acoustic coupling medium (1140).

29. The measuring device (1000) according to any one of the preceding claims, wherein, The measuring device is configured for applications in the medical and / or pharmaceutical fields.

30. A control device (2000), comprising: a housing (2100), the housing including a coupling portion (2300), the coupling portion of the housing being configured to receive the measuring device (1000); a second electrical connector (2280, 2280', 2280"); an electronic control unit ECU (2200), the ECU being electrically connected to the second electrical connector and being configured to send one or more control signals to the measuring device and to receive one or more measurement signals from the measuring device.

31. The control device (2000) according to claim 30, wherein, The coupling part (2300) includes a locking mechanism, which is configured to selectively lock the measuring device (1000) in a coupled position or selectively unlock the measuring device when coupled to the control device.

32. The control device (2000) according to claim 31, wherein, The locking mechanism includes a bayonet locking mechanism.

33. The control device (2000) according to any one of claims 31 or 32 further includes a switch (2360), which is configured to selectively lock and unlock the locking mechanism. Optionally, selectively locking and unlocking includes tactile and / or audible feedback.

34. The control device (2000) according to any one of claims 30 to 33 further includes a cover (2330), which is configured to cover at least a part of the coupling part (2300).

35. The control device (2000) according to claim 34, wherein, The cover (2330) is configured to cover the second electrical connector (2280) when no measuring device (1000) is coupled to the control device (2000).

36. The control device (2000) according to any one of claims 30 to 35 further includes a status indicator (2210), which is connected to the ECU (2200) and is configured to indicate the operating state of the control device and / or the operating state of the measuring device (1000) when coupled to the control device (2000).

37. The control device (2000) according to any one of claims 30 to 36, wherein, The second electrical connector (2280, 2280', 2280") is configured to distribute electrical signals. Optionally, the electrical signals include control signals and measurement signals.

38. The control device (2000) according to any one of claims 30 to 37, wherein, When the measuring device (1000) is coupled to the control device, the control device is configured to send a control signal to the control device, and receive a measurement signal from the measuring device, the measurement signal indicating the characteristics of the fluid flow in the measurement section (1230) of the fluid conduit (1200) of the measuring device.

39. The control device (2000) according to any one of claims 30 to 38, wherein, The second electrical connector (2280) includes one or more of a USB-C connector, a USB-A connector, a USB-B connector, a micro-USB connector, a mini-USB connector, an HDMI connector, and a SUB-D connector.

40. The control device (2000) according to any one of claims 30 to 39, wherein, The second electrical connector (2280', 2280") includes a first coil (2281') and a second coil (2282').

41. The control device (2000) according to any one of claims 30 to 40, wherein, The first coil (2281') is configured to be inductively coupled to the first coil (1481') of the measuring device (1000), and the second coil (2282') is configured to be inductively coupled to the second coil (1482') of the measuring device (1000).

42. The control device (2000) according to any one of claims 30 to 41, wherein, The first electrical connector (2280', 2280") includes a third coil (2283'), which is configured to be inductively coupled to the third coil (1181') of the measuring device (1000).

43. The control device (2000) according to any one of claims 30 to 42, wherein, The control device (2000) is configured to determine one or more of the following based on inductive coupling between a third coil (2283', 2283") of the control device and a third coil (1483', 1483") of the measurement device (1000): whether there is a coupled measurement device, the operating state of the coupled measurement device, and the type of the coupled measurement device.

44. The control device (2000) according to any one of claims 30 to 43, wherein, The ECU (2200) includes a first coil (2281') and a second coil (2282') of the second electrical connector (2280'), and optionally a third coil (2283') of the second electrical connector (2280').

45. The control device (2000) according to any one of claims 30 to 44, wherein, The second electrical connector (2280, 2280', 2280") is configured to distribute electrical signals, optionally where the electrical signals include control signals and measurement signals.

46. The control device (2000) according to any one of claims 30 to 45, wherein, The second electrical connector (2280, 2280', 2280") is configured to be connected to a first electrical connector (1480, 1480', 1480") of the measurement device (1000).

47. The control device (2000) according to any one of claims 30 to 46, wherein, The ECU (2200) includes a function for controlling one or more sensors of the measurement device (1000) and receiving measurement signals for the one or more sensors, where the one or more sensors include one or more of the following: a temperature sensor, a pressure sensor, a conductivity sensor, and an optical sensor.

48. The control device (2000) according to any one of claims 30 to 47, wherein, The control device is at least partially made of components including stainless steel.

49. The control device (2000) according to any one of claims 30 to 48, wherein, The control device is configured for applications in the medical and / or pharmaceutical fields.

50. A system (100) for measuring fluid flow, the system comprising: the measurement device (1000) according to any one of claims 1 to 29; and the control device (2000) according to any one of claims 30 to 49.

51. A method (1500) for manufacturing the measurement device (1000) according to any one of claims 1 to 29, the method comprising: preparing (1506) an inner surface of a body of the measurement device (1100) for casting a thermoplastic resin; positioning (1508) the PBC (1400) of the measurement device relative to the body (1100); performing (1510) the casting of the thermoplastic resin; and performing (1512) the curing of the thermoplastic resin.

52. The method according to claim 51, further comprising arranging (1504) a first ultrasonic transducer (1410) and a second ultrasonic transducer (1420) relative to the body (1100).

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